[PATCH] D156982: [JITLink][ELF] Create big-endian ELF object

[Kai Luo via Phabricator via llvm-commits]

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We're missing creating big-endian ELF object.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D156982

Files:
  llvm/lib/ExecutionEngine/JITLink/ELF.cpp
  llvm/test/ExecutionEngine/JITLink/ppc64/ppc64-relocs.s


Index: llvm/test/ExecutionEngine/JITLink/ppc64/ppc64-relocs.s
===================================================================
--- llvm/test/ExecutionEngine/JITLink/ppc64/ppc64-relocs.s
+++ llvm/test/ExecutionEngine/JITLink/ppc64/ppc64-relocs.s
@@ -2,7 +2,7 @@
 # RUN: llvm-jitlink -abs external_var=0xffff0000 -abs puts=0xffff6400 -abs \
 # RUN:   foo=0xffff8800 -noexec %t
 # RUN: llvm-mc -triple=powerpc64-unknown-linux-gnu -filetype=obj -o %t %s
-# RUN: not llvm-jitlink -abs external_var=0xffff0000 -abs puts=0xffff6400 -abs \
+# RUN: llvm-jitlink -abs external_var=0xffff0000 -abs puts=0xffff6400 -abs \
 # RUN:   foo=0xffff8800 -noexec %t
 #
 # Check typical relocations involving external function call, external variable
Index: llvm/lib/ExecutionEngine/JITLink/ELF.cpp
===================================================================
--- llvm/lib/ExecutionEngine/JITLink/ELF.cpp
+++ llvm/lib/ExecutionEngine/JITLink/ELF.cpp
@@ -52,6 +52,22 @@
     }
   }
 
+  if (Data[ELF::EI_DATA] == ELF::ELFDATA2MSB) {
+    if (Data[ELF::EI_CLASS] == ELF::ELFCLASS64) {
+      if (auto File = llvm::object::ELF64BEFile::create(Buffer)) {
+        return File->getHeader().e_machine;
+      } else {
+        return File.takeError();
+      }
+    } else if (Data[ELF::EI_CLASS] == ELF::ELFCLASS32) {
+      if (auto File = llvm::object::ELF32BEFile::create(Buffer)) {
+        return File->getHeader().e_machine;
+      } else {
+        return File.takeError();
+      }
+    }
+  }
+
   return ELF::EM_NONE;
 }
 


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